Hi YiTsun Liu, Based on the output provided by you we can see that system is complaing about the memory requirements that are not meet. Not enough memory in the system to run this image Required pmem/iomem: 80462950/5242880 Basicaly with the current hardware configuration of this router it is not possible to run this image. At this stage you have two options: 1. upgrade the RAM memory of this router if possible. 2. use IOS version which requires less momory than this image. On CCO download page you have memory requirements for both RAM and flash for each IOS version. I hope this helps. cheers, Lukasz
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